As we know, protein plays an important role in keeping our body and mind healthy. Rightly, amino acids are the building blocks of protein in body. They play significant role in making the structure of protein, enzymes, some hormones and neurotransmitters. They help a lot in metabolism in the body. Because of this specific reason, hard workers, body builders and weight lifters take supplements in there diet that can provide them extra nourishment of specific amino acids.

Athletes and hard workers take amino acids as a food supplement for getting extra energy. Amino acids repair their muscular tissues and help in building the new one. The roles of amino acid are repairing and building of nails, hair, skin, ligament, glands and other parts of the body. 
There are about 20 numbers of amino acids, and we can get it naturally. It can be divided in two groups, viz essentials and non-essentials. Essential amino acids are those which can't be produced by the body and must be taken from outside. Your body can only get these amino acids from the food you eat. Where as non-essential amino acids are also very important to your body and your body can manufacture steroids it.

Why we need amino acids?
The essential amino acids are those which your body cannot produce. Your body only gets these through your diet. Some of them are:

• Isoleucine: It helps in formation of hemoglobin. It also helps to clot blood and healing to open wounds. 

• Leucine: It helps in healing wounds, regulating energy and helps in the preventing the breakdown of muscle tissue. 

• Lysine: Helps improve concentration; enhances fertility; aids in preventing herpes simplex infection.

• Methionine: It helps in lowering cholesterol. It also helps in treatment of schizophrenia and Parkinson's disease; may protect against tumors. 

• Phenylalanine: Acts as an antidepressant; can function in some forms as a natural painkiller. 

• Threonine: Necessary for utilization of protein in diet.

• Tryptophan: Aids in reducing anxiety; helps induce sleep; may help in control of alcoholism. 

• Valine: Maintains the nitrogen balance and preserves the use of glucose. 

The nonessential amino acids are also important, but your liver can manufacture them. 

• Alanine: Enhances immune system; lowers risk of kidney stones; aids in alleviating hypoglycemia. 

• Arginine: Increases sperm count; accelerates wound healing; enhances sexual performance in men; tones muscle tissue.

• Asparagine: Promotes balance in the central nervous system.

• Glutamic Acid: Helps to improve brain function; aids in metabolism of sugars and fats; useful in treatment of children's behavioral disorders, epilepsy, and muscular dystrophy. 

• Glutamine: Helps improve brain function; alleviate fatigue; aid in ulcer healing time; build and maintain muscle; elevate mood; reduce craving for sugar and alcohol. 

• Glycine: Necessary for central nervous system functions; aids in healing; helps treat stomach hyperacidity; prevent seizures. 

Sources of amino acids:-Meat, egg, fish egg white, milk and milk products, and vegetables such as legumes, peas and grains are high sources of protein i.e. amino acids. As it helps to create and repair muscular tissue, and helps our body through so many healing process, it is very essential for our body and should be taken daily for a good health and mind.